Career

Demel started his professional career in the French Ligue 2 with Nîmes Olympique. He was discovered and bought by Arsenal, and spent a year there before being transferred to Borussia Dortmund. He left Arsenal claiming he was homesick and therefore observers were baffled at his move to Dortmund. He debuted in the Bundesliga in 2003, and left Dortmund to join Hamburg in 2005, after struggling to hold down a first team place.

While at Hamburg, Demel has played regularly as both a right back and a midfielder. On 4 May 2006, he signed a new contract with Hamburg, tying him to the club until 2010.